"Since her admission to Mary Free Bed on March 8, Abigail has made significant strides," the press release from the Grand Rapids center, which was obtained by PEOPLE, states.
Kopf was shot on Feb. 20 and was transferred from a local hospital to Mary Free in early March. Days later, she said her first words.
"Abbie has done great," said her mother, Vickie Kopf in the press release. "To see where she is today is amazing."
Mary Free Bed posted a video of the 14-year-old's hard work and progress on YouTube.
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On Wednesday, Vickie shared photos of Abigail on the family's GoFundMe page. She is pictured alongside beauty pageant winner Jodi Beckman, who was Miss Greater Kalamazoo and a Miss Michigan contestant and is a brain injury survivor herself.
"We are grateful for the thoughts, prayers and support of so many people. You have walked beside our family every step of the way, and we can never adequately express our gratitude," Vickie posted on the site.
Vickie added, "Now, we hope and pray that you will continue sharing this journey with us. We need you, and more importantly Abbie needs you."
The next stage of Abigail's recovery will include continued outpatient rehabilitation and surgery to repair her skull.
The accused gunman, Michigan Uber driver Jason Dalton, 45, allegedly shot and killed six people and injured two. Dalton allegedly admitted to the shooting after being arrested.